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author | Jun Lin <CHLin56@nuvoton.com> | 2021-04-27 16:12:11 +0800 |
---|---|---|
committer | Commit Bot <commit-bot@chromium.org> | 2021-04-29 03:03:47 +0000 |
commit | 24be106a07765b0c5416fa8fdb3e976e40dbaf5e (patch) | |
tree | 69c574a7edac3803feb7de911269d6f75e0264cb /common/vstore.c | |
parent | 8bc05328420e50ecf17c41e237eb4210a43eef46 (diff) | |
download | chrome-ec-24be106a07765b0c5416fa8fdb3e976e40dbaf5e.tar.gz |
npcx9: port80: support 4 bytes mode for eSPI host interface
eSPI PUT_IOWR_SHORT protocol can send a max of 4 bytes of data in a
single transaction. This allows the host to send 4 bytes of the Port80
code at one time. This CL sets the bit OFS0_SEL~OFS3_SEL in the DPAR1
register to let the EC hardware put full 4-bytes of Port80 code to
DP80BUF FIFO. It also groups the 4-byte code into a single 32-bits
variable when necessary by analyzing the offset field in the DP80BUF
register.
BRANCH=none
BUG=b:184872297
TEST=build the image with "#define CONFIG_PORT80_PRINT_IN_INT 1";
connect npcx9_evb to the eSPI host emulator; the host sends a
PUT_IOWR_SHORT transaction to IO address 0x80 with 4 bytes of code
"0xEEE20400"; the EC console shows:
[63.694685 Port 80: 0xeee20400]
Then the host sends a single byte "0xaa" to Port80, the EC console
prints:
[576.531790 Port 80: 0xaa]
Signed-off-by: Jun Lin <CHLin56@nuvoton.com>
Change-Id: I5dfbc0d08172042cb43d72eeb6f0e7da63feccf0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2847668
Tested-by: CH Lin <chlin56@nuvoton.com>
Reviewed-by: Raul E Rangel <rrangel@chromium.org>
Commit-Queue: CH Lin <chlin56@nuvoton.com>
Diffstat (limited to 'common/vstore.c')
0 files changed, 0 insertions, 0 deletions